My old 99R6 racebike used to run flawlessly and only has about 6,000 miles on it. I let her sit for about 6 years and then decided to put her back on the street but when i had the carbs cleaned/ new plugs/ new air filter new battery it has now developed a miss/ studder at 3-4k rpm and then a worse studder at 9-11k rpm. This only happens at full throttle, at 1/2 throttle it goes through the rev range smoothly. My mechanic said he didnt change any of the carb settings and is not for sure what the issue is. I took the bike home and rode it for about 200 miles thinking maybe it might improve but it didnt change at all. Id love to hear some opinions on what u guys think could be going on, thanks in advance!